The precision-engineered Wolf Tooth Seatpost Clamp secures your seatpost and looks good doing it. At the hart of this seatpost collar is our custom self-aligning bolt and anchor. The M5 bolt includes a spherical washer and mates with a cylindrical anchor barrel. This means that threads are always perfectly aligned, preventing binding and ensuring consistent clamping force. Machined from 6061 aluminum in our Minneapolis facility, the Wolf Tooth Seatpost Clamp is availabl in seven sizes. COMPATIBILITY Clamping Diameter: - 28.6mm/29mm - 29.8mm/30mm - 31.8mm/32mm - 34.9mm/35mm - 36.4mm/36mm - 38.6mm/39mm - 39.7mm/40mm Frames may vary slightly from nominal diameters due to tolerances and paint thickness. Clamps will fit on frames that are within +/- 0.5mm of specified size. For example, a 34.9mm clamp will fit frames with a seat tube measuring from 34.4mm to 35.4mm in diameter. Clamping height: 13.5mm **Note**: The seatpost clamp should match the diameter of the seat tube on your frame and not the diameter of the seatpost itself. TECH SPECS Weight: 29.8mm - 18g | 31.8mm - 19g | 34.9mm - 20g | 36.4mm - 20g | 38.6mm - 21g | 39.7mm - 24g Material: 6061 T6 aluminum, M5 stainless steel bolt with integrated washer Tool Interface: 4mm hex key Torque spec: 6 Nm Max Made in the USA